<!DOCTYPE html>
<html lang="zh-cn">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>id选择器</title>
    <style>
        #area01 {
            /* ID选择器 适用于某处单独处应用的场景 */
            color: #00FF00;
        }
        
        p {
            color: #ae12a6;
        }
    </style>
</head>

<body>
    <p id="area01">桃李不言</p>
    <p>下自成蹊</p>
</body>

</html>